Yield Reconciliation in Auto-Component Stamping: Skeleton Scrap, FI Steel and Section 394 TCS

A Maruti Tier-1 panel-stamping supplier near Manesar opens the Monday-morning yield review at the press-shop control room. 12.0 metric tonnes of CR sheet coil entered the gate on Saturday morning under OEM ownership against a free-issue dispatch challan. Across Saturday and Sunday the press ran the door-inner-LHS programme — a complex deep-draw with an MSA-agreed yield band of 65-72%. The control-room screen shows actual yield at 68% — comfortably inside the band. Good parts produced: 8.16 MT. Skeleton scrap returned to the OEM yard: 2.16 MT. End scrap: 0.72 MT. Reconciled process loss: 0.96 MT — at 8% of input, slightly higher than the 5-6% the programme typically runs at but within tolerance.

Then the controller asks the question that does not have an obvious answer. “The OEM dispatch register for Saturday shows 12.025 MT, not 12.000. The gate-pass shows 12.012 MT. The production-shift report shows 12.000 MT consumed. Skeleton-scrap weighbridge ticket: 2.158 MT. End-scrap weighbridge: 0.715 MT. We are 25-37 kg short across three independent ledgers, depending on which ledger you start from. Where is it?”

This is the yield reconciliation stamping skeleton scrap auto India problem in operational detail, and the answer matters in two directions. First, the OEM’s yield-deviation short-pay calculation depends on which input weight the OEM uses — its own dispatch register, the supplier’s gate-pass, or the production-shift report. Second, the Section 394 TCS at 1% under payment code 1071 on the skeleton-scrap leg depends on whether the 2.158 MT skeleton scrap was sold from the supplier’s premises or returned and sold from the OEM’s yard. Both directions push the answer to the kilogram level.

Quick reference

Why yield bands matter and how the OEM reads them

A stamping yield band is set in the Schedule-A by part code, agreed between the OEM’s costing team and the supplier’s industrial-engineering team at programme launch. The lower bound is typically calculated by the OEM from a baseline nest pattern on virgin tooling with first-batch material, less an agreed concession for normal operating variability. The upper bound rarely matters operationally — a yield above the band is treated as supplier upside.

The OEM uses the yield band for three purposes. First, costing. The Schedule-A piece-price is built on the assumption of yield at the lower bound. The supplier’s conversion-charge is paid against good-parts dispatched; the OEM’s cost of FI steel is consumed against coil dispatched. The implicit scrap value at the lower bound is the OEM’s expected scrap recovery. Second, short-pay. Below the lower bound the OEM short-pays on the conversion-charge bill at the agreed scrap-equivalent rate per kilogram of yield deviation. Third, tooling-review trigger. Persistent yield below the lower bound triggers a joint tooling review at the OEM — the underlying cause is typically die wear, strip-feed misalignment, or material-grade variance.

The yield reconciliation that the supplier runs daily closes the loop in the other direction. The supplier needs to know its actual yield against the band on every coil consumed, not at month-end. A 3-percentage-point yield drop on a 12 MT coil at scrap-equivalent rate of ₹42 per kg is a ₹15,120 short-pay per coil — and a typical panel supplier consumes 5-8 coils per day per press line.

The four-ledger reconciliation at the supplier end

Four independent ledgers must close on every coil consumed.

Ledger 1 — OEM outbound dispatch register. The OEM dispatches the coil to the supplier under a Rule 55 challan that carries the coil weight as weighed at the OEM’s outbound weighbridge. This is the OEM’s view of input.

Ledger 2 — Supplier inward gate-pass register. The supplier receives the coil and weighs it at its own inward weighbridge. This is the supplier’s view of input. Weighbridge variance of 5-15 kg per coil is normal; persistent variance above 20 kg per coil triggers a weighbridge-calibration question at one or both ends.

Ledger 3 — Production-shift report. The press-shop logs coil consumption per shift against the planned production. This is the operational view of input as actually pressed.

Ledger 4 — Good-parts dispatch register. The supplier dispatches good parts back to the OEM under its own invoice (for conversion charges) and Rule 55 challan (for the OEM’s onward consumption). Good-parts weight × count per shift gives the output side.

The yield reconciliation runs from ledger 3 (operational input) to ledger 4 (operational output), with cross-checks to ledgers 1 and 2 at the boundary. A 25-37 kg discrepancy across the four ledgers — as in the Maruti example above — is at the upper end of the normal range but inside the operational tolerance most Schedule-As permit. Above 50 kg per coil the OEM raises a query.

Skeleton scrap versus end scrap — why the distinction matters

Skeleton scrap and end scrap have the same metallurgical content but different commercial values and different operational meanings.

Skeleton scrap is engineered offcut — the geometric pattern left after the nest pattern stamps the good part. On a door-inner the skeleton looks like a window-frame; on a B-pillar reinforcement the skeleton carries a complex U-pattern. Skeleton scrap is clean, large-piece, segregable by grade and commands a higher price per kilogram in the scrap market — typically ₹38-46 per kg for CR-grade automotive skeleton against ₹28-34 per kg for mixed end scrap.

End scrap is the coil ends (the head and tail of the coil that cannot be fed through the press), the side trim from coil-width adjustments, and the strip-side offcut from feed adjustments. End scrap is mixed in grade and form and commands a lower price.

The OEM Schedule-A typically values the implicit scrap recovery at a weighted-average rate that accounts for the expected skeleton-to-end ratio. The supplier’s actual scrap value depends on disposal route and segregation discipline. A supplier that segregates skeleton from end scrap at the point of generation recovers materially more value per kilogram than one that bins everything together — and a Schedule-A that agrees a fixed scrap-equivalent rate insulates the supplier from price variability but transfers the segregation-discipline upside to the OEM.

Section 394 TCS at payment code 1071 — where the obligation lands

Section 394 of the Income Tax Act 2025 replaces legacy Section 206C(1) from 1 April 2026 and continues the 1% TCS on scrap sale under the new payment-code architecture as payment code 1071. The application logic is the same as under the legacy regime — TCS at 1% on the consideration received from the sale of scrap, collected by the seller from the buyer, deposited to the credit of the Central Government, and reflected in the buyer’s Form 26AS for FY 2026-27 and onwards.

For a stamping supplier handling FI-steel scrap, the operative question is who sells the scrap to the scrap merchant. Three patterns are common:

Pattern A — Returned to OEM under Rule 55, OEM sells. The supplier returns the skeleton and end scrap on a Rule 55 return challan against the original FI-steel dispatch. The scrap arrives at the OEM yard and is sold by the OEM to a scrap merchant. The OEM is the seller. The OEM applies Section 394 TCS at 1% under payment code 1071 on the sale and the supplier’s TCS register carries no entry on this leg.

Pattern B — Sold from supplier premises under OEM authorisation, proceeds remitted to OEM. The supplier sells the scrap from its own premises under a Schedule-A authorisation, collects the proceeds, and remits the proceeds (net of an agreed handling fee) to the OEM. The supplier is the seller for TCS purposes — the underlying ownership economics do not change the seller-identity test. The supplier applies Section 394 TCS at 1% under payment code 1071 on the sale and reflects in the supplier’s TCS return.

Pattern C — Sold from supplier premises under OEM authorisation, supplier retains the proceeds. The supplier sells the scrap and retains the proceeds as part of the agreed conversion-cost build-up — the implicit scrap recovery has been priced into the conversion charge. The supplier is the seller for TCS purposes. Section 394 TCS at 1% applies on the supplier’s sale.

The wider Section 394 framework — including the threshold relief and the buyer-side mechanics — is dissected in TCS on scrap sale under Section 394. The cross-era handling for FY 2025-26 sales that close in FY 2026-27 is covered in Form 26AS reconciliation for auto-component suppliers — Form 26AS entries for FY 2025-26 carry the legacy Section 206C(1) reference; FY 2026-27 entries carry the new Section 394 / payment code 1071 reference. The wider payment-code stack is in TDS payment codes 1001-1092.

Worked example — Maruti panel supplier, 12 MT/day, 68% door-inner yield

A panel-stamping supplier near Manesar runs 12 MT of CR coil per day on a door-inner-LHS programme for Maruti. MSA-agreed yield band: 65-72%. Scrap-equivalent rate: ₹42 per kg. Skeleton-to-end ratio: 75:25 by weight. Operating days: 280.

Annual physical flow:

• Coil input: 12 MT × 280 days = 3,360 MT.
• Good parts output at 68% yield: 2,285 MT.
• Total scrap generated: 3,360 − 2,285 = 1,075 MT.
• Of which skeleton: 1,075 × 0.75 = 806 MT.
• Of which end scrap: 1,075 × 0.25 = 269 MT.
• Reconciled in-process loss component (1.5% on input): 50 MT carved out of the scrap line.
• Net scrap returned-or-sold: 806 + 269 − 50 = 1,025 MT.

Yield deviation exposure (illustrative):

The supplier runs at 68% against an MSA lower bound of 65% — no yield-deviation short-pay this year. But suppose 25 operating days drop to 62% yield because of die wear in the third quarter. Yield gap on those 25 days: 3 percentage points (62 versus 65) on 12 MT/day = 0.36 MT/day shortfall × 25 days = 9 MT shortfall × ₹42 = ₹3.78 lakh of yield-deviation short-pay. The OEM raises a debit note for this on the supplier’s conversion-charge bill in the next monthly settlement, and the supplier handles it through the short-pay decomposition workflow.

Section 394 TCS exposure — supplier sells skeleton scrap from premises (Pattern B/C):

• Skeleton scrap sold from supplier premises: 806 MT.
• Sale price at ₹42 per kg: 806 MT × ₹42 = ₹3.39 crore.
• Section 394 TCS at 1% under payment code 1071: ₹3.39 lakh.
• End scrap sold separately: 269 MT × ₹32 = ₹86 lakh; TCS at 1% = ₹86,000.
• Aggregate annual TCS register entry on Section 394 / 1071: ₹4.25 lakh on this programme alone.

Section 394 TCS exposure — OEM-return route (Pattern A):

• All 1,025 MT returned under Rule 55 to Maruti’s yard.
• Supplier’s TCS register: nil on this leg.
• OEM’s TCS register carries the obligation on the onward sale.

The choice between the two routes is commercial — the OEM-return route eliminates supplier TCS exposure but adds logistics cost and removes the supplier’s segregation-discipline upside. The supplier-sale route adds TCS register discipline and the corresponding cash-flow management (TCS collected from the scrap buyer, deposited to credit of CBDT, reflected in the buyer’s 26AS) but recovers the segregation upside.

The cumulative supplier-side discipline cost on Pattern B/C — segregation, weighbridge, scrap-buyer master with PAN and 26AS visibility, TCS deposit calendar, monthly TCS return — is real. A supplier doing this without dedicated tooling typically carries 2-3 person-weeks per month of accounts-team time on the scrap-and-TCS leg alone.

How the yield-and-FI-steel reconciliation closes month-end

The month-end FI-steel-and-yield close runs three documents in parallel:

• The monthly FI-steel reconciliation pack to the OEM — coil-in from OEM dispatch register × good-parts-out from supplier invoices × scrap-returned from Rule 55 return challans + scrap-sold-from-premises (if applicable, with proceeds remitted or retained per Schedule-A) + reconciled in-process loss.
• The GSTR-1 leg carries no entries for FI-steel inward (Rule 55 challan, no GST) but carries the conversion-charge invoices to the OEM and any scrap-sale invoices (if Pattern B or C) — see the wider GSTR-2B reconciliation for auto-component manufacturers for the supplier-side discipline.
• The TCS register carries the Section 394 / payment code 1071 entries on scrap sold from supplier premises, with PAN of the scrap buyer for 26AS reflection.

A clean three-document close with the OEM-dispatch register and the supplier’s inward gate-pass reconciled at the boundary is the standard a disciplined Tier-1 holds. A break in any leg — typically a weighbridge variance or a Rule 55 return challan not yet acknowledged at the OEM yard — surfaces in the next OEM joint reconciliation call.

Continue reading — the auto-component reconciliation cluster

• Sub-pillar: Automotive component manufacturing reconciliation in India.
• Adjacent leg: Free-issue material accounting for stamping operations — the underlying FI-steel inward flow.
• TCS leg: TCS on scrap sale under Section 394 — the payment-code 1071 framework.
• Payment-code stack: TDS payment codes 1001-1092 — the unified payment-code architecture for the IT Act 2025.
• External authority: the Income Tax Department of India for Section 394 and payment code 1071.

What automated reconciliation changes

Manual handling of 280 days of daily yield reports, the four-ledger FI-steel reconciliation, the skeleton-and-end scrap segregation, the monthly OEM reconciliation pack, the Section 394 TCS register at payment code 1071, and the cross-era Form 26AS reflection is where the 2-3 person-weeks per month of accounts-team time disappears. Purpose-built auto component reconciliation software India ingests the OEM outbound dispatch register, the supplier inward gate-pass and the production-shift report on a daily cadence, calculates actual yield against the MSA-agreed band per part programme, surfaces yield-deviation candidates in real time, classifies scrap by disposition, applies Section 394 TCS at 1% under payment code 1071 on the supplier-sold leg, builds the monthly OEM FI-steel reconciliation pack, and produces a board-visible yield-and-FI-steel dashboard for the panel programme. TransactIG carries 24+ industry presets including configurations for FI-steel stamping operations and the Section 394 scrap-TCS leg. Customer outcomes include match-rate improvement from 51% to 88% on FI-steel reconciliation ledgers. Build is two-to-four weeks on AWS Mumbai (ISO 27001:2022). For the inbound match discipline see three-way matching software India.